diff --git a/lib/demo/index.js b/lib/demo/index.js
index f5d39d92..e08fdc26 100644
--- a/lib/demo/index.js
+++ b/lib/demo/index.js
@@ -26,6 +26,7 @@ require('gcli/commands/help').startup();
 require('gcli/commands/intro').startup();
 require('gcli/commands/pref').startup();
 require('gcli/commands/pref_list').startup();
+require('gcli/commands/qsa').startup();
 
 require('demo/commands/basic').startup();
 require('demo/commands/bugs').startup();
diff --git a/lib/gcli/commands/qsa.css b/lib/gcli/commands/qsa.css
new file mode 100644
index 00000000..26905d7a
--- /dev/null
+++ b/lib/gcli/commands/qsa.css
@@ -0,0 +1,23 @@
+.qsa-node-list, .qsa-node-attr-list, .qsa-node-attr-list .qsa-node-attr {
+  margin: 0;
+  padding: 0;
+  display: inline;
+}
+.qsa-node-list {
+  color: #999;
+}
+.qsa-node-list .qsa-node {
+  display: inline-block; 
+  background: #F2F2F2;
+  border: 1px solid #D6D6D6;
+  border-radius: .2em;
+  margin: .2em;
+  padding: .5em;
+  cursor: pointer;
+}
+.qsa-node-attr-name {
+  color: #7ED3E8;  
+}
+.qsa-node-attr-value {
+  color: #F20505;
+}
diff --git a/lib/gcli/commands/qsa.html b/lib/gcli/commands/qsa.html
new file mode 100644
index 00000000..0e14082a
--- /dev/null
+++ b/lib/gcli/commands/qsa.html
@@ -0,0 +1,13 @@
+<div>
+  <p>${l10n.lookupFormat('qsaResultIntroText', [nodes.length, selector])}<span if="${nodes.length>maxDisplayedNodes}">${l10n.lookup('qsaResultsTooMany')}</span></p>
+  <ol class="qsa-node-list" if=${nodes.length<=maxDisplayedNodes}>
+    <li class="qsa-node" foreach="node in ${nodes}" onclick="${onclick}" data-selector="${node.selector}" title="${l10n.lookupFormat('qsaNodeTooltip', [node.selector])}">
+      &lt;<span class="qsa-node-tag">${node.tagName.toLowerCase()}</span>
+      <ul class="qsa-node-attr-list">
+        <li class="qsa-node-attr" foreach="attr in ${node.attributes}">
+          <span class="qsa-node-attr-name">${attr.name}</span>="<span class="qsa-node-attr-value">${attr.value}</span>"
+        </li>
+      </ul>/&gt;
+    </li>
+  </ol>
+</div>
diff --git a/lib/gcli/commands/qsa.js b/lib/gcli/commands/qsa.js
new file mode 100644
index 00000000..ee8eb351
--- /dev/null
+++ b/lib/gcli/commands/qsa.js
@@ -0,0 +1,105 @@
+define(function(require, exports, module) {
+
+'use strict';
+
+var util = require('util/util');
+var l10n = require('util/l10n');
+var gcli = require('gcli/index');
+
+var qsaViewHtml = require('text!gcli/commands/qsa.html');
+var qsaViewCss = require('text!gcli/commands/qsa.css');
+
+/**
+ * Transform a nodeList into an array.
+ * Useful for forEach'ing for example.
+ * @param nodeList The nodeList as returned by querySelectorAll
+ * @return The transformed array
+ */
+function nodesToArray(nodeList) {
+  return Array.prototype.slice.call(nodeList);
+}
+
+/**
+ * QuerySelectorAll (qsa) command spec
+ */
+var qsaCmdSpec = {
+  name: 'qsa',
+  description: l10n.lookup('qsaDesc'),
+  manual: l10n.lookup('qsaManual'),
+  params: [{
+    name: 'query',
+    type: 'string',
+    defaultValue: '*',
+    description: l10n.lookup('qsaQueryDesc'),
+  }],
+  returnType: 'qsaCmdOutput',
+  exec: function(args, context) {
+    var out = {
+      nodes: [],
+      selector: args.query
+    };
+    
+    // An invalid selector may lead to a SyntaxError exception e.g. '3' or ''
+    try {
+      out.nodes = nodesToArray(context.document.querySelectorAll(args.query));
+    } catch(e) {}
+
+    // Converting the nodes and attributes to plain objects to allow JSONing
+    out.nodes.forEach(function(node, index, nodeList) {
+      var attributes = nodesToArray(node.attributes);
+      attributes.forEach(function(attr, index, attrList) {
+        attrList[index] = {
+          name: attr.name,
+          value: attr.value
+        };
+      });
+
+      nodeList[index] = {
+        tagName: node.tagName,
+        attributes: attributes,
+        selector: util.findCssSelector(node)
+      };
+    });
+    
+    return out;
+  }
+};
+
+/**
+ * QuerySelectorAll (qsa) command output converter
+ * qsaCmdOutput -> View
+ */
+var qsaConverterSpec = {
+  from: 'qsaCmdOutput',
+  to: 'view',
+  exec: function(qsaCmdOutput, context) {
+    return context.createView({
+      html: qsaViewHtml,
+      css: qsaViewCss,
+      options: {allowEval: true, stack: 'qsa.html'},
+      data: {
+        onclick: function(ev) {
+          context.exec({
+            command: 'qsa',
+            args: {query: ev.currentTarget.dataset.selector}
+          });
+        },
+        selector: qsaCmdOutput.selector,
+        nodes: qsaCmdOutput.nodes,
+        maxDisplayedNodes: 100,
+        l10n: l10n
+      }
+    });
+  }
+};
+
+exports.startup = function() {
+  gcli.addCommand(qsaCmdSpec);
+  gcli.addConverter(qsaConverterSpec);
+};
+exports.shutdown = function() {
+  gcli.removeCommand(qsaCmdSpec);
+  gcli.removeConverter(qsaConverterSpec);
+};
+
+});
diff --git a/lib/gcli/nls/strings.js b/lib/gcli/nls/strings.js
index e0a48dd0..e0368019 100644
--- a/lib/gcli/nls/strings.js
+++ b/lib/gcli/nls/strings.js
@@ -433,7 +433,25 @@ var i18n = {
 
     // Short description of the 'allowSetDesc' setting. Displayed when the user
     // asks for help on the settings.
-    allowSetDesc: 'Has the user enabled the \'pref set\' command?'
+    allowSetDesc: 'Has the user enabled the \'pref set\' command?',
+
+    // A very short description of the 'qsa' command.
+    qsaDesc: 'Execute querySelectorAll given a selector and show matches',
+
+    // A fuller description of the 'qsa' command.
+    qsaManual: 'Execute querySelectorAll on the current document and show the number of matched elements as well as the elements themselves (provided the selector returns less than 100 nodes)',
+
+    // A very short description of the 'query' parameter to the 'qsa' command.
+    qsaQueryDesc: 'The CSS selector to use, or several selectors seperated by commas',
+
+    // The intro text to the 'qsa' command shows after the command has been run and gives the number of nodes matched
+    qsaResultIntroText: '%1$S node(s) found for selector %2$S',
+
+    // The too many results message of the 'qsa' command shows when there are more than X nodes matched by the query, to request the user to refine it
+    qsaResultsTooMany: ', please refine your selector to display the resulting nodes.',
+
+    // The tooltip text is displayed on hovering over a matched node, to inform the user of the action executed on click
+    qsaNodeTooltip: 'Click to run qsa with selector %S'
   }
 };
 exports.root = i18n.root;